Math

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Solve the equation by factoring, by finding square roots, or by completing the square.
4(x+8)^2=144

I'm not sure if I'm suppose to divide or multiply the 4 to both sides..

  • Math -

    you can go about it in two ways:

    divide by 4 first. You want to divide by 4, because that removes it from the left side of the equation:

    (x+8)^2 = 36
    (x+8) = ±6
    x = -8 ± 6

    Or, you can think make the left side a perfect square:

    [2(x+8)]^2 = 144
    2(x+8) = ±12
    x+8 = ±6
    x = -8 ± 6

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